LLMs

GPT-5 Nano API

GPT-5 Nano is the lightest and fastest model in the GPT-5 family, built for high-throughput use cases like classification, simple instruction-following, and structured outputs. It prioritizes speed and low cost, making it ideal for routing, pre-processing, or embedded AI where latency and efficiency matter more than nuanced reasoning.

1RPC.ai

Reasoning

Speed

$0.05/$0.40

Input/Output

400,000Context Window

Implement

Get started with an API-friendly relay

Send your first request to verified LLMs with a single code snippet.

import requests
import json
response = requests.post(
    url="https://api.1rpc.ai/v1/chat/completions",
    headers={
        "Authorization": "Bearer <1RPC_AI_API_KEY>",
        "Content-type": "application/json",
    },
    data=json.dumps({
        "model": "gpt-5-nano",
        "messages": [
            {
                "role": "user",
                "content": "What is the meaning of life?"
            }
        ]
    })
)
print(response.json())

Pricing

Estimate Usage Across Any AI Model

Adjust input and output size to estimate token usage and costs.

GPT-5 Nano Token Costs Calculator

Input tokens≈ 7,500 words

Output tokens≈ 75,000 words

$0.0405Total cost per million tokens

Learn about Pricing